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Plasma display device and plasma display panel drive method

A plasma display and panel technology, applied to static indicators, instruments, etc., can solve the problems of wall charge disappearance and increase, write discharge is easy to be unstable, and the time spent is longer.

Inactive Publication Date: 2012-06-13
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In addition, since the scan pulse voltage is sequentially applied to the scan electrodes in the write period for each scan electrode, in a particularly high-definition panel, the time taken for the write period becomes longer due to the increase in the number of scan electrodes.
Therefore, the discharge cell to which writing is performed at the end of the writing period also has the problem that the disappearance of wall charges increases, and the writing discharge tends to be unstable, compared with the discharge cell that is written to at the beginning of the writing period.

Method used

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  • Plasma display device and plasma display panel drive method
  • Plasma display device and plasma display panel drive method
  • Plasma display device and plasma display panel drive method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0064] figure 1 It is an exploded perspective view showing the structure of the panel 10 according to Embodiment 1 of the present invention. A plurality of display electrode pairs 24 including scan electrodes 22 and sustain electrodes 23 are formed on glass front panel 21 . And a dielectric layer 25 is formed to cover the scan electrodes 22 and the sustain electrodes 23 , and the protective layer 26 is formed on the dielectric layer 25 .

[0065] In addition, in order to lower the discharge start voltage in the discharge cell, the protective layer 26 is formed from a material mainly composed of MgO, which has been used as a panel material, and when neon (Ne) and xenon (Xe) gases are sealed The secondary electron emission coefficient is large and the durability is good.

[0066] A plurality of data electrodes 32 are formed on the rear plate 31 , and a dielectric layer 33 is formed to cover the data electrodes 32 , and a cross-shaped partition wall 34 is formed thereon. Furth...

Embodiment approach 2

[0152]In this embodiment, in the subfields in which the luminance weight ratio occupied by one field is equal to or greater than a predetermined ratio, or in the subfields in which the number of sustain pulses generated in a sustain period is equal to or greater than a predetermined number, scanning is sequentially switched as described in Embodiment 1. The IC operates so that writing is performed first from an area with a higher partial lighting ratio based on the detection result in the partial lighting ratio detection circuit. In addition, in a subfield in which the luminance weight ratio occupied by one field is less than a predetermined ratio, or in a subfield in which the number of sustain pulses generated in a sustain period is less than a predetermined number, scanning is applied to scan electrodes SC1 through SCn in a predetermined order. Pulse voltage Va is used for writing. For example, scan ICs are operated to sequentially apply scan pulse voltage Va from scan elec...

Embodiment approach 3

[0178] The present invention is also applicable to a first address period in which scan electrodes SC1 to SCn are divided into a first scan electrode group and a second scan electrode group, and scan pulses are respectively applied to scan electrodes 22 belonging to the first scan electrode group. The address period is constituted by the second address period in which the scan pulses are applied to the scan electrodes 22 belonging to the second scan electrode group, and the second initialization operation is performed between the first address period and the second address period. The panel driving method of 2-phase driving can obtain the same effect as above.

[0179] Figure 18 It is a waveform diagram of driving voltage applied to each electrode of panel 10 according to Embodiment 3 of the present invention. in addition, Figure 19 It is a schematic diagram showing an example of a scan sequence corresponding to a partial lighting rate (an example of a write operation sequ...

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Abstract

A plasma display device includes: a plasma display panel (10); a scan electrode drive circuit (43) which successively applies a scan pulse to a scan electrode during a write-in period so as to perform a write-in operation; and a partial lighting ratio detection circuit (47) which divides a display region of the plasma display panel (10) into a plurality of areas and detects a ratio of the number of discharge cells to be lit with respect to the total number of discharge cells as a partial lighting ratio for each of the areas and each of subfields. The scan electrode drive circuit (43) performsthe write-in operation on the areas in the descending order of the partial lighting ratio detected by the partial lighting ratio detection circuit (47) so as to generate a stable write-in discharge.

Description

technical field [0001] The present invention relates to a plasma display device and a driving method of a plasma display panel used in a wall-mounted television and a large monitor. Background technique [0002] In a representative AC surface discharge panel as a plasma display panel (hereinafter, simply referred to as a “panel”), a plurality of discharge cells are formed between a front panel and a rear panel that are arranged to face each other. Regarding the front panel, a plurality of display electrode pairs consisting of a pair of scan electrodes and sustain electrodes are formed in parallel on the front glass substrate, and a dielectric layer and a protective layer are formed to cover these display electrode pairs. Regarding the back panel, a plurality of parallel data electrodes, a dielectric layer covering these electrodes, and a plurality of barrier ribs parallel to the data electrodes are respectively formed on the rear glass substrate, and a plurality of barrier r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/28G09G3/20G09G3/288G09G3/291G09G3/292G09G3/293G09G3/296G09G3/298
CPCG09G2360/16G09G3/293G09G3/296G09G2310/0213G09G2320/0686G09G3/2927G09G2310/0218
Inventor 折口贵彦庄司秀彦中田秀树
Owner PANASONIC CORP